Yesterday I have lost all the contacts on my GT-I9000. The device was left alone for 5 minutes & when I checked it again for some work, I found that the contact numbers had been lost & I am not able to find them.
Is this a common problem with GT-I9000? Is there any way to get the contacts back?

I also lost the contacts yesterday on a Samsung Galaxy S, because I thought they were synced to Google (the sync setting was active, and showed it was done) and re-installed the OS (hoping to get the contacts back from Google). But it turned out they had not been saved on Google (although no errors were reported). Perhaps, this is similar to the sync to Picasa problem which is reported to happen when you have also connected to your Facebook etc. accounts, no?
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imz -- Ivan ZakharyaschevApr 21 '13 at 15:28